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Finding the Fourth Proportional to 68,655.60, 103,012.20 and 51,276.24

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Solution

The fourth proportional to 68,655.60, 103,012.20 and 51,276.24 is: 76,935.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,655.60 : 103,012.20 = 51,276.24 : x
  2. Step 2: Convert to fraction form
    68,655.60/103,012.20 = 51,276.24/x
  3. Step 3: Cross multiply
    68,655.60x = 103,012.20 × 51,276.24
  4. Step 4: Simplify right side
    68,655.60x = 5,282,078,290.13
  5. Step 5: Solve for x
    x = 5,282,078,290.13/68,655.60
  6. Step 6: Final answer
    x = 76,935.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.